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  <title>计算数组中所有值的和</title>

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</div><hr /><div id="function.array-sum" class="refentry">
   <div class="refnamediv">
    <h1 class="refname">array_sum</h1>
    <p class="verinfo">(PHP 4 &gt;= 4.0.4, PHP 5)</p><p class="refpurpose"><span class="refname">array_sum</span> &mdash; <span class="dc-title">
     计算数组中所有值的和
    </span></p>

   </div>
 <div class="refsect1 description" id="refsect1-function.array-sum-description">
  <h3 class="title">说明</h3>
     <div class="methodsynopsis dc-description">
      <span class="type"><a href="language.pseudo-types.html#language.types.number" class="type number">number</a></span> <span class="methodname"><strong>array_sum</strong></span>
       ( <span class="methodparam"><span class="type">array</span> <code class="parameter">$array</code></span>
      )</div>

    <p class="para rdfs-comment">
     <span class="function"><strong>array_sum()</strong></span> 将数组中的所有值的和以整数或浮点数的结果返回。
    </p>
   </div>

 <div class="refsect1 parameters" id="refsect1-function.array-sum-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">array</code></em></dt>

     <dd>

      <p class="para">
       输入的数组。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.array-sum-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   所有值的和以整数或浮点数的结果返回。
  </p>
 </div>

 <div class="refsect1 changelog" id="refsect1-function.array-sum-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>4.2.1</td>
       <td>
      PHP 4.2.1 之前的版本修改了传入的数组本身，将其中的字符串值转换成数值（大多数情况下都转换成了零，根据具体值而定）。
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-function.array-sum-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4887">
    <p><strong>Example #1 <span class="function"><strong>array_sum()</strong></span>  例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$a&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #0000BB">2</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">4</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">6</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">8</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #DD0000">"sum(a)&nbsp;=&nbsp;"&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">array_sum</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$b&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"a"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">1.2</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"b"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">2.3</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"c"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">3.4</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #DD0000">"sum(b)&nbsp;=&nbsp;"&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">array_sum</span><span style="color: #007700">(</span><span style="color: #0000BB">$b</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
sum(a) = 20
sum(b) = 6.9
</pre></div>
    </div>
   </div>
  </p>
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